quiver
靫 centers on a container for arrows: a quiver. It is a specific leather object used to hold arrows.
靫 combines 革 (leather) with 叉, which likely contributes a phonetic element. The character specifically denotes a leather quiver.
The left side 革 means leather, and the right side 叉 looks like a forked shape. Imagine a leather quiver with a forked opening where arrows are inserted.
For ジン, picture a genie (ジン) emerging from a leather quiver instead of a lamp: genie -> ジン, and the quiver holds the magical arrows.